Exponential Equation Which Can Be Used To Model

Write the equation of the exponential function for the given graph.

• y = 2(2)^x

• y = 2(1)^x

• y = 1(1/2)^x

• y = 2^x

Write the equation of the exponential function for the given graph.

• y = 3^x

• y = 2(1/3)^x

• y = (1/3)^x

• y = -1(1/3)^x

A tennis tournament begins with 128 players. At the end of round one, there will be 64 players. There are 32 players at the end of round 2 and 16 players remaining after round 3. Write the equation that best models this situation.

• y = -64x + 128

• y = 0.5x + 128

• y = 128(0.5)^x

• y = 128(2)^x

Which equation describes the story below?
You have $5 and triple your money every day. 

• y=5(3)^x

• y=5^x

• y=5(3x)

• y=15^x

Write an exponential function to model the situation. Solve.
2) The cost of tuition at a college is $12,000 and is increasing at a rate of 6% per year. What will the cost be after 4 years?

• C(t) = 12000(1.06)^t ; $3149.72

• C(t) = 12000(.06)^t ; $3149.72

• C(t) = 12000(.06)^t ; $1472.95

• C(t) = 12000(1.06)^t ; $15149.72

Write the equation of the exponential function for the given table.

• y = 1(4)^x

• y = 1(1/4)^x

• y = 4(4)^x

• y = 1/4(1)^x

In March, 2020, before the Covid-19 lockdown, 1,200,000 Texans had applied for unemployment. During the COVID-19 lockdown, the number of people applying for unemployment increased by 4% each month. What exponential function can be used to find the number of people applying for unemployment after x months of COVID-19 lockdown?​

Which of the following exponential functions represents an initial value of 1450 and a decay of 18% for x years?

Which of the following exponential functions represents an initial value of 1780 and a growth of 18% for x years?​

The current population of India (2021) is 1.393 billion people, at an annual rate of increase of 97%. Which exponential function models the population, in billions of people, of India after x number of years?​